Shoe-stapler structure



June 2,1931. J ADLER SHOE STAPLER STRUCTURE Filed Dec. 4, 1929 Patented June 2, 1931 UNlTED STATES PATENT OFFICE JACOB ADLER, OF ST. LOUIS, MISSOURI, ASSIGNOR TO LANDIS MACHINE COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI SHOE-STAPLER STRUCTURE Application filed December 4, 1929.

My invention relates to shoe staplers of the type described in Patent 1,016,930, issued February 13, 1912 to W. H. Borden, and consists in a novel staple driver and associated structure for such amachine.

Machines of this type form successive staples from a continuous flat wire from which each staple is cut by means of a knife disposed diagonally of the wire. The staple wire is then given the staple form with its ends bevelled in opposite directions (see Figure 7). When the staple is driven, the-re is a tendency for its legs to spread in opposite directions due to the thrust of the work against the bevelled ends. As a result of this tendency, the ends of the staple, after passing through the work, sometimes fail to strike the anvil cup properly and, instead of being clinched, project above the surface of the insole of the shoe or project into the upper. The latter mentioned result is particularly likely to occur in repairing womens shoes by the stapling process as the staple is inserted close to the edge of the sole and of the upper and there is little margin between the upper and even the intended location of the staple leg in its passage through the sole.

In the machine described, the staple is formed with its width paralleling the front of the machine and substantially paralleling the edge of the shoe as it is guided through the machine by the operator, and the bevels on the ends of the staple legs face, respectively, towards and away from the front of the machine so that their deflection from the vertical is, respectively, towards and away from the upper and the edge of the shoe sole.

The main object of my invention is to provide the machine with a staple driver which will turn the staple slightly from the position in which it is formed so that the bevelled ends of the staple legs will incline the latter along the edge of the sole or the shoe upper, rather than across the same, thereby avoiding injury to the upper by a projecting staple.

In the accompanying drawings which illustrate a selected embodiment of my invention Figure 1 is a front view of the head of a machine of the type referred to a part of the Serial No. 411,596.

same being sectioned to more clearly illus trate the structure involved.

Figure 2 is an enlarged detail section and View of some of the parts shown in Figure 1.

Figure 3 issimilar to Figure 2 but shows the parts in a different position.

Figure at is a similar View showing the parts in a third position.

Figure 5 is a view of the'lower end of the staple driver.

Figure 6 is a detail of an individual staple.

The head of the machine includes a stationary plate 1 which carries a discharge throat block 14: and the head mounts upright slides 4, a-slidable outer former member 3, and an inner former member 24. A driving bar 5 slides relatively to member 3 and is impelled downwardly by a spring 5a after having been raised by a suitable cam and released therefrom in a well-known manner as de scribed in the Borden patent referred to above.

The staple wire strip is shown at 6 as being fed parallel with the front of the machine and the staple S is formed over an inside former 2-1 (see Figure 2) with its legs 10 and 11 lying in a plane parallel with the front of the machine. The inside former is then withdrawn and the driver 8 descends, engaging the cross bar 12 of the staple and forcing the staple downwardly through the passageway 13 into the throat block 14 and into the work indicated at W (see Figure 3). The lower end of the driver 8 is provided with a groove 15 disposed diagonally of the plane occupied by the staple andthe edges of this groove are slightly rounded so that, as the driver strikes the rounded staple cross bar 12, the latter enters groove 15 and the staple is thereby twisted about its axis so as to be inclined from the plane of its formation to the extent induced by the driver slot.

Figure 3 shows the staple so inclined as it is being forced through the block 14 by the driver and it will be maintained in this inclined position until it is driven through the work as shown in Figure 4, when its points should engage the anvil A and be clinched as shown at 16. If the point nearest the shoe upper U should miss the anvil, its departure from a plane extending transversely of the shoe upper will be suflicient to avoid the objectionable tendency of piercing the upper.

The driver 8 is subject to rapid wear and it is customary to renew these drivers at intervals and I show the same detachably secured to the driver bar by means of a holding block 17 and a screw 18. The driver is clamped betweenblock 17 and bar 5 by means of screw 18 and the driver, preferably, is round and can be rotated about its axis so that its groove is positioned at-any desired angle to the front of the machine or to the plane in which the legsof the staple lie as indicated at 19 in Figure 5. I am aware that it has been proposed to turn the staple by means of one or more grooves in the passageway between the former members and the discharge-end of the throat block and such turning means are described in the copending applications filed of. even date herewith by Ernest Dnnford, Serial Numbers 411,589 and 411,590. I do not herein claim broadly the turning of the staple in its passage, irrespective of the means for obtaining that result. I believe, however, that I am the first to rotate the staple by means of the driving elements and I contemplate the exclusive use of variations in the details of construction of the driver and associated parts which come within the scope of my claims.

I claim:

1. In a shoe stapler, staple forming. members, and a staple driver, said driver including elements for turning the staple, as formed by said members, about its axis as it is driven.

2- In a shoe. stapler, staple-forming members, adriving bar, and a staple engaging driver, said driver including elements for turning the staple, as formed by said members, about its axis as it is driven,-and said driver and bar including means for varying the degree of turning effected by said driver.

3. In a shoe stapler, staple forming mem bers arranged to form a staple positioned ina predetermined vertical plane, a driver for driving said staple into the work, said driver including elements for engaging said staple and turning it into another vertical planebefore entering the work.

l. In ashoe stapler, staple forming memhers, a staple discharge passageway'havi-ng a smooth interior, and means for turning a staple about-its axis as it is driven fronrsaid members through said passageway.

5. In a shoe stapler, a. staple throat block with a smooth interior periphery, a driver movable through said block, and elements on said driver for turning a staple driven there-- by about its axis before it enters said block.

6. In a shoe stapler, members for forming a staple in a predetermined plane, and a driverfor driving said staple, the end of said driver having a groove for receiving the-cross bar of the staple, said groove being disposed at an angle to said plane.

7. In a shoe stapler, members for forming a staple in a predetermined plane,'and a driver bar,'a staple driver seated in said bar and rotatable about its axis, the staple engaging end of said driver being provided with a transverse groove for receiving and guiding the cross bar of the staple, and means for securing said driver in a desired angular position in-said driver bar.

8. In a shoe stapler, members for forming a staple with its legs equidistant from the front of the machine, and a stapler driver, the end of said driver having a groove for receiving the cross bar of the staple, said groove extending diagonally of the front of the machine.

In testimony whereof I hereunto afiix my signature this dayof November, 1929.

JACOB ADLER; 

